One Customs Code, a 2.7-Fold Unit-Value Spread — and the Liner That Fails the 2030 Grade

Every flexible intermediate bulk container exported anywhere in the world travels under a single customs classification. Inside that one code, unit values span 2.7 times. A builder’s bag that carries sand to a site and a UN-certified, food-grade, lined bulk bag that carries a pharmaceutical excipient are, to the trade statistics, the same product. They are not the same product, and the fact that the data cannot tell them apart has three consequences that matter more than the classification itself.

What the average hides

The first consequence is that a rising average unit value in the customs series is not evidence of price. It can be a mix shift toward higher-specification bags — Type B, Type C, Type D constructions, UN-certified packaging for dangerous goods, laminated or coated fabrics, integral liners — with no price movement on any individual product at all. Reading the series as a price index is the most common error made about this market, and it produces a confident number that describes nothing.

The second is benchmarking. A converter cannot use the trade data to locate its own realisation against the market, because the market realisation is an average of two products with a 2.7-fold gap. The number is real; it is simply not about anything a single supplier sells.

The third is policy. Origin questions, trade-remedy cases and market-access arguments about industrial packaging all get answered with a unit value that is an artefact of mix. The measure that would settle them — value per bag by construction type — does not exist in any published series, which is why the primary layer of this research matters: the only way to see the mix is to ask the people making it.

The liner is where the format’s future is decided

An FIBC is usually two materials doing two jobs. Polypropylene fabric provides strength: woven, coated or uncoated, often 150 to 250 grams per square metre. A polyethylene liner provides the barrier, because cement, minerals, food powders and chemicals all need one, and because a woven fabric is porous by construction.

Functionally that is a good design. In a regulatory environment organised around what happens to the bag after it is empty, it is an awkward one: two polymers joined in use, separated only by whoever bothers to separate them.

Regulation (EU) 2025/40 on packaging and packaging waste puts two distinct obligations on this format, and they are routinely confused. Recycled content is a minimum share of secondary material in the product. Recyclability is a performance grade the product must achieve by design — and it is the grade, not the content, that a polypropylene bag with a bonded polyethylene liner fails first.

Those two axes are not substitutes for one another, and they are not equally distributed across the cluster. The woven polypropylene sack market faces the recycled-content mandate — 35 per cent by 2030 — which is a supply question. The FIBC faces the recyclability grade, which is a design question. The sack market’s mandate is about molecules; the bulk bag’s is about construction.

The bulk bag can afford to fix this. The sack cannot.

Here the 2.63 multiple becomes useful rather than merely interesting. A bulk bag already costs 2.63 times what the equivalent 25 kg sacks cost per tonne. Its buyer has already accepted a substantial premium for performance, and has already written a business case that survives it. Moving to a mono-material or mono-polymer construction — a coated fabric that carries the barrier itself, a polyethylene liner that can be mechanically separated, or a liner elimination where the payload permits — is a smaller increment on an already-premium product than it is on a thirteen-cent sack.

That asymmetry is the real finding. The format most exposed to a design-for-recycling requirement is also the format best able to pay for meeting it, because its value proposition was never price. The sack is the one without headroom: it competes at USD 0.13 a unit where its customer’s packaging bill is already only 4.19 per cent of a tonne of cement and the whole procurement conversation is about hundredths of a cent.

What would change the answer

Three things, and none of them is technical.

Whether the customer will pay. The barrier exists because the payload requires it. A customer shipping moisture-sensitive powder into a humid market will not accept a sack that lets the product cake, whatever the grade says. Mono-material answers exist; the question is who absorbs the cost.

Whether the grade is measured on the bag or on the format. A recyclability grade applied to a construction type would move the whole market at once. A grade applied to an individual product only drives the suppliers who are already differentiating.

Whether trade data ever sees the change. If the mix moves toward mono-material constructions inside the same customs code, the unit-value average will drift and nobody will be able to read it as anything. The market will have re-engineered itself invisibly.

The format competition this construction sits inside — paper multiwall, woven polypropylene, the bulk bag and the silo that erodes all three — is set out in the Global Cement Packaging Market, the hub report for this cluster.

About the method

This analysis rests on the product tables, construction-level cost structures and regulatory review in the Global FIBC & Bulk Bags Market Report, 2026–2033, weighted approximately 70 per cent secondary and 30 per cent primary research. The secondary layer is customs nomenclature and trade series, the EU packaging and packaging waste regulation, converter disclosures and standards for flexible intermediate bulk containers. The primary layer is open-ended interviews and structured conversations with FIBC manufacturers, liner converters and polymer recyclers, together with conference-floor discussion of specification changes. The unit-value spread is taken from the trade series; the reading of it as a mix artefact rather than a price movement is a judgement formed in the primary layer and stated as such. No third-party market-research estimate is used anywhere in this piece.

Further reading

• Global FIBC & Bulk Bags Market Report, 2026–2033 — the full construction-level analysis, product tables and trade series.
• Sixty-Four Billion Sacks Is a Decoy — why grammage, not unit count, is the material market.
• Twenty Bags Cost USD 3.77 Against a USD 90 Tonne of Cement — the 4.19 per cent line item that explains why the sack has no headroom.
• Regulation (EU) 2025/40 (PPWR) and Plastics Recyclers Europe — the design and recycling-capacity sides of the same question.